Copyright © 1998 General Motors Corp. 1–11
GENERAL DESCRIPTION
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
B. Transmission Changes Versus TransID Number
1. TransID 1
The internal wiring harness wiring change to make a TID 1 transmission was put into production
before the introduction of the WTEC III system and does pertain to some WTEC II units. The
TID 1 internal harness was made by connecting the C3 Pressure Switch ground (digital/signal
ground; WTEC II wire 161) to the Sump Temperature Sensor and Oil Level Sensor ground
(analog ground; wire 135) in the internal harness. In WTEC II, the signal ground wire (wire
161) is routed through the transmission connector, terminal W, and then to the ECU, terminal
B27. In WTEC III, this same wire in the internal harness becomes the TransID wire (wire 195),
and it goes to the ECU, terminal T13 (blue connector). The purpose of TransID 1 was to provide
a common transmission for use with both WTEC II and WTEC III systems (V7A and V8).
The only difference between a pre-TransID transmission and a TransID 1 transmission is the
internal wiring harness which connects the digital and analog grounds on the TID 1 harness.
Adapter harness P/N 200100 can be ordered from St. Clair Technologies to provide the same
connection outside the transmission and allow a pre-TransID transmission to be “converted” to a
TransID 1 transmission.
All models of the World Transmission were built with the TransID 1 internal (feedthrough)
harness beginning in September, 1996. Two changes were rolled into this update: the wiring
change for TID 1 and a change to use a molded channel rather than the braided covering which
was previously used. Both changes were rolled into the same internal harness P/N even though
there was a delay in implementing the channel which resulted in the two S/N breaks. Table 1–1
lists the internal harness P/Ns for the different transmission models along with the S/Ns for both
changes for each harness.
2. TransID 2
TransID 2 is only used with WTEC III controls and is covered in TS2973EN Troubleshooting
Manual.
Table 1–1. TransID 1 S/N Breakpoint
Transmission
Model
Pre-TransID
Harness P/N
TransID 1
Harness P/N
S/N at Wiring
Change
S/N at
U-Channel
MD 3000/B 300/B 400 w/OLS 29516322 29529472 6510088864 6510096671
MD 3000/B 300/B 400 w/o OLS 29516323 29529473 6510089316 6510096683
MD 3070PT 29516324 29529474 6510090786 6510096675
HD 4000/B 500 w/OLS 29516325 29529475 6610014067 6610015591
HD 4000/B 500 w/o OLS 29516326 29529476 6610014084 6610015700
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